That's Not A Hat is a dynamic and engaging party board game designed by Ravensburger, perfect for families and social gatherings. This game is a madcap memory game that revolves around bluffing and confidence.

Players start with a gift face up in front of them, and as the game progresses, they pass these gifts to each other based on the instructions on the cards. The twist lies in the fact that players can challenge each other if they believe the gift they received is not what was declared.

Gameplay Steps:

1. Initial Setup: Each player begins with a gift face up in front of them.
2. Card Draw: The starting player draws a card from the deck and turns their current gift face down.
3. Gift Passing: The player passes their facedown gift to the player to their left or right, depending on the card.
4. Declaration: The player declares what the gift is.
5. Challenge: If a player doubts the declaration, they can challenge their opponent.
6. Game Continuation: Play continues until one player has three penalty points. The player with the fewest penalties wins.

This game has received significant critical acclaim, being nominated for awards, and is a great choice for game nights and gatherings.